anaerobic bioremediation Articles

Cost implications of hydrogen donor selection for in-situ bioremediation of chlorinated solvents

The use of enhanced anaerobic bioremediation for treatment of chlorinated solvents in groundwater has increased at a rapid rate within the past three years. Since there are a number of different hydrogen donors that can potentially be used, it is important that practitioners understand the cost implications of the hydrogen donor(s) selected for the project. A comparative economic analysis is ...

Aug. 8, 2011

By Terra Systems, Inc. (TSI)

Protocol for Enhanced In Situ Bioremediation Using Emulsified Edible Oil

An in-depth discussion of the EOS® patented technology and its usefulness for site remediation is presented. Details of how the technology works, design considerations as well as strengths and limitations of the technology are presented. 1.1 INTRODUCTION Management of groundwater contaminated with chlorinated solvents, perchlorate, and explosives is one of the Department of Defense’s ...

May 1, 2006

By EOS Remediation, LLC

Transport of Edible Oil Emulsions in Clayey Sands: 3D Sandbox Results and Model Validation

ABSTRACT: Injection of edible oils into the subsurface can provide an effective, low-cost alternative for stimulating anaerobic bioremediation processes. However, concerns have been raised about the effects of oil buoyancy and variations in aquifer permeability on the final distribution of oil in the subsurface. Three dimensional sandbox experiments were conducted to study the distribution of ...

May 1, 2006

By EOS Remediation, LLC

Bioaugmentation for accelerated in-situ anaerobic bioremediation

A successful anaerobic bioaugmentation was carried out on a trichloroethene (TCE)-contaminated aquifer at Dover Air Force Base, DE, using a microbial enrichment culture capable of dechlorinating TCE to ethene. A hydraulically controlled pilot system 12 18 m was constructed 15 m below ground surface in an alluvial aquifer to introduce nutrients and substrate into the groundwater. Ambient TCE and ...

Aug. 8, 2011

By Terra Systems, Inc. (TSI)

Prevent Stagnation Zones during Injection to Improve Contact Efficiency

When injecting into multiple wells simultaneously, stagnation zones can develop preventing effective reagent delivery. Figure 1 shows the simulated EOS Pro distribution in a homogeneous aquifer when EOS Pro is injected into all the wells in a biobarrier at the same time. Simultaneous injection creates gaps in the biobarrier where converging streamlines prevent effective distribution. ...

Nov. 27, 2019

By EOS Remediation, LLC

Comingled Plume? No Problem!

CGRS Environmental Services and RPI Group Approved Installer, Vista Geoscience, were a bit surprised at what happened recently at a Denver hydrocarbon site they were remediating with Trap & Treat® BOS 200® injections. In late 2011, PCE contamination was also discovered (most likely coming from an upgradient dry cleaner). The client stated “The data shows that the BOS 200® ...

Jul. 30, 2014

By Remediation Products Incorporated (RPI)

Controlling Methane ar ERD and ISCR Applications

In situ chemical reduction (ISCR) and enhanced reductive dehalogenation (ERD) have demonstrated success in the remediation of numerous recalcitrant and toxic compounds, including chlorinated ethenes and hexavalent chromium. ISCR describes the combined effect of stimulated biological oxygen consumption (via fermentation of an organic carbon source), direct chemical reduction with zero-valent iron ...

Oct. 1, 2014

By Provectus Environmental Products, Inc.

Anaerobic Bioremediation of Acid Mine Drainage using Emulsified Soybean Oil

Batch incubation and flow-through column experiments were conducted to evaluate the use of emulsified soybean oil for in situ treatment of acid mine drainage. Addition of soybean oil, soluble substrates, and a microbial inoculum to the batch incubations resulted in complete depletion of SO4, 50% reduction in Fe, and an increase in pH to >6. A one time injection of emulsified soybean oil, ...

Jan. 1, 2005

By EOS Remediation, LLC

Aerobic and Anaerobic Bioremediation of cis-1,2-Dichloroethene and Vinyl Chloride

ABSTRACT This paper presents a comparative study of aerobic and anaerobic bioremediation of cis-1,2-dichloroethene (DCE) and vinyl chloride (VC). The study includes laboratory bench scale testing of anaerobic biodegradation followed by a side by side field pilot test comparing the effectiveness of aerobic and anaerobic biodegradation processes. Prior to initiating the pilot test, DCE and VC ...

Jan. 1, 2000

By Weston Solutions, Inc

Conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and soil at Dover Air Force Base

LOCATION: Dover, DelawarePROJECT DATE: July, 1996 to July, 1999CLIENT: The Remediation Technology Development Forum and Dover AFB BACKGROUND: The Remediation Technology Development Forum (RTDF) for Bioremediation of Chlorinated Solvents Work Group has conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and soil at Dover ...

Dec. 22, 2008

By Terra Systems, Inc. (TSI)

Effective distribution of emulsified edible oil for enhanced anaerobic bioremediation

Abstract Recent laboratory and field studies have shown that injection of emulsified edible oils can provide an effective, low-cost alternative for stimulating anaerobic biodegradation processes. A pilot-scale permeable reactive bio-barrier (PRBB) was installed at a perchlorate and chlorinated solvent impacted site by injecting 380 L of commercially available emulsion (EOS® ) containing ...

Jan. 20, 2007

By EOS Remediation, LLC

Case study - Groundwater remediation of a contaminated site using enhanced anaerobic bioremediation

Chlorinated solvents are a common threat to drinking water sources throughout the United States. While handling and disposal practices today are more closely regulated and monitored, this has not always been the case. With dry cleaners using tetrachloroethene (PCE) and industrial manufacturing facilities commonly using a variety of solvents from trichloroethene (TCE) to methylene chloride, past ...

Jan. 21, 2016

By DeWind One-Pass Trenching LLC

Enhanced Anaerobic Bioremediation of a TCE Source Area at the Tarheel Army Missile Plant using EOS®

Emulsified oil substrate (EOS®) is being used to remediate a trichloroethene (TCE) source area at the Tarheel Army Missile Plant (TAMP) in Burlington, North Carolina. 1. INTRODUCTIONEmulsified oil substrate (EOS®) is being used to remediate a trichloroethene (TCE) source area at the Tarheel Army Missile Plant (TAMP) in Burlington, North Carolina. TAMP is a government-owned, formerly ...

Jun. 14, 2007

By EOS Remediation, LLC

Groundwater contamination of 1,1,1-TCA, PCE - Manufacturing facility

LOCATION: Glen Cove, New YorkPROJECT DATE: September 2000 to presentCLIENT: Confidential BACKGROUND: Groundwater in a sand and gravel aquifer beneath this active manufacturing facility was contaminated with 1,1,1-TCA (concentrations up to 480 mg/L), PCE, and their degradation products. The site owner, faced with a long term (in excess of 100 years) and expensive pump and treat system, ...

Dec. 22, 2008

By Terra Systems, Inc. (TSI)

DOD evaluates bioaugmentation for remediating low-pH aquifers

The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

Mar. 30, 2009

By The Hazardous Waste Clean-Up Information (CLU-IN)

Enhanced Anaerobic Bioremediation of a TCE Source at the Tarheel Army Missile Plant Using EOS

EOS, or emulsified oil substrate, was used to stimulate anaerobic biodegradation of trichloroethene (TCE) and tetrachloroethene (PCE) at a former Army-owned manufacturing facility located in the Piedmont area of North Carolina. Previous use of chlorinated solvents at the facility resulted in soil and groundwater impacts. Ten years of active remediation utilizing soil vacuum extraction and air ...

Nov. 7, 2015

By EOS Remediation, LLC

Anaerobic bioremediation of groundwater using edible oil substrate EOS in an unconfined groundwater aquifer

To treat groundwater contaminants in situ, enhanced anaerobic bioremediation processes can be stimulated through addition of soluble substrates. At a dry cleaners site located in San Jose, California, the goal was to find a substrate that is long lasting and easily distributed into the saturated soils. After evaluating several alternatives, in situ bioremediation using an emulsified edible oil ...

Oct. 21, 2010

By True Blue Technologies, Inc.

Tacoma, Washington - Well 12A superfund site - Case Study

Combined Remedies for DNAPL Remediation Project Summary TRS Group, Inc. (TRS) teamed with KEMRON and AMEC, under KEMRON's U.S. Army Corps of Engineers (USAGE) Environmental Remediation Services Multiple Award Task Order Contract (MATOC), to perform electrical resistance heating (ERH) for the remediation of volatile organic compounds (VOCs) in the vadose zone soil and shallow groundwater at ...

Nov. 25, 2015

By TRS Group, Inc.

Anaerobic Bioremediation of Groundwater Using Edible Oil Substrate EOS® In an Unconfined Groundwater Aquifer

ABSTRACT: To treat groundwater contaminants in situ, enhanced anaerobic bioremediation processes can be stimulated through addition of soluble substrates. At a dry cleaners site located in San Jose, California, the goal was to find a substrate that is long lasting and easily distributed into the saturated soils. After evaluating several alternatives, in situ bioremediation using an emulsified ...

Jun. 14, 2007

By EOS Remediation, LLC

Heavy metal resistant anaerobic bacterial strains from brewery digester sludge

This work focused on the study of the types of heavy–metal–resistant anaerobic bacteria from the sludge of a brewery wastewater treatment plant exposed to high concentrations of dissolved Cd (II), Cu (II) and Zn (II). Characterisations were carried out by polymerase chain reaction of the 16S rRNA gene of bacterial strain. Using special culture media, two types of strong heavy metal–resistant ...

Apr. 29, 2013

By Inderscience Publishers